Dr. Tang, Tang K. 's publons link picture

Dr. Tang, Tang K.

Vice President, Academia Sinica
Distinguished Research Fellow
Academician, Academia Sinica
  • 02-27899156(lab) (Lab) (Room No: 301)
  • 02-26523901(o)
  • 02-27829143 (Fax)

Specialty:
  • Centrosome and Cilia Biogenesis
  • Mitosis
  • Neural Stem Cell Division

Education and Positions:
  • Ph.D. Human Genetics, Yale University


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Phosphorylation of CPAP by Aurora-A Maintains Spindle Pole Integrity during Mitosis.

Dr. Tang, Tang K.
Cell Reports, Mar 15, 2016

CPAP is required for centriole elongation during S/G2 phase, but the role of CPAP in mitosis is incompletely understood. Here, we show that CPAP maintains spindle pole integrity through its phosphorylation by Aurora-A during mitosis. Depletion of CPAP induced a prolonged delay in mitosis, pericentriolar material (PCM) dispersion, and multiple mitotic abnormalities. Further studies demonstrated that CPAP directly interacts with and is phosphorylated by Aurora-A at serine 467 during mitosis. Interestingly, the dispersal of the PCM was effectively rescued by ectopic expression of wild-type CPAP or a phospho-mimic CPAP-S467D mutant, but not a non-phosphorylated CPAP-S467A mutant. Finally, we found that CPAP-S467D has a low affinity for microtubule binding but a high affinity for PCM proteins. Together, our results support a model wherein CPAP is required for proper mitotic progression, and phosphorylation of CPAP by Aurora-A is essential for maintaining spindle pole integrity.